12号普通单开道岔的尖轨长度为（）。
A.6.25m
B.7.405m
C.7.7m
D.7.04m
参考答案：C
Recently I was frustrated that my essay was rejected my a newspaper．________, I had my wallet picked on the bus on the way home．
A．To be honest
B．To make matters worse
C．To tell you the truth
D．Believe it or not
下面哪一组一分钟脉搏数不正常（）？
A、65-70；
B、70-75；
C、75-80；
D、＞100或＜60；
